MultiversX hit by Upbit warning after mainnet exploit

MultiversX has come under formal trading review at Upbit after the South Korean exchange flagged EGLD on Sept. 21 following a mainnet security incident that forced the network to stop progressing. Summary Upbit designated EGLD for trading caution after MultiversX confirmed a VM-level atomicity exploit attempt Saturday. EGLD deposits and withdrawals remain suspended, with Upbit planning to reopen withdrawals before deposits later. MultiversX paused network progression after invalid state changes and prepared a fix for shadow-fork testing. Upbit will review EGLD through October 19-23 before deciding whether trading support should continue thereafter. Kraken placed EGLD trading pairs in cancel-only mode while deposits and withdrawals remained paused there. Upbit’s official notice designated EGLD/KRW, EGLD/BTC and EGLD/USDT as trading caution markets after the exchange said an unresolved security incident involving the blockchain could have caused, or could potentially cause, user losses. Upbit had already suspended EGLD deposits and withdrawals at 5:47 p.m. KST on Sept. 19. When transfers eventually resume, the exchange said withdrawals will return first. Deposit support will require a separate announcement after the trading caution review begins. 멀티버스엑스(EGLD) 거래 유의 종목 지정 안내 멀티버스엑스(EGLD/KRW, EGLD/BTC, EGLD/USDT)가 거래 유의 종목으로 지정되었습니다. 입출금 서비스는 이미 중단되었으며, 추후 재개 시 출금 서비스만 우선 재개됩니다. 입금 서비스 재개 여부는 별도 안내드릴 예정입니다. MultiversX (EGLD/KRW,… — Upbit Korea (@Official_Upbit) September 21, 2026 You might also like: Upbit-Naver Deal Faces Regulatory Clash Over Ownership Rules MultiversX exploit triggered the Upbit warning The warning follows a confirmed attempt to exploit a virtual-machine-level atomicity issue on the MultiversX mainnet. MultiversX initially disclosed on Sept. 19 that it was investigating a potential mainnet issue and prioritizing user safety and stable network operation. As crypto.news previously reported, the project’s first statement did not classify the event as an exploit or disclose any confirmed financial loss. A later project update said an actor had “attempted to exploit a VM-level atomicity issue.” The attempt produced invalid state changes, prompting developers to stop network progression while engineers worked on a repair. The team prepared a software fix for testing through a shadow fork, allowing developers to reproduce mainnet conditions without immediately applying changes to the live network. MultiversX said deployment would proceed “subject to successful testing” and would require coordination with validators, exchanges and infrastructure providers. No firm restart deadline appeared in the public updates reviewed. Security tracker SlowMist separately recorded the incident as an attempted VM-level atomicity exploit involving invalid on-chain state changes. Its public database did not list a confirmed loss amount. EGLD withdrawals remain blocked across exchanges Upbit’s action came as several exchanges restricted MultiversX transfers following the network disruption. Bithumb suspended EGLD deposits and withdrawals on Sept. 19 after MultiversX block production stopped. The exchange said transfer services would remain unavailable until it confirmed network stability.